Question

please solve it QUES no2

Answer 1

OK this is equivalents

Answer 2

let us assum that 2√3/5 is rational number, so it can be written in the form of p/q, where p and q are co-prime
so, 2√3/5 = p/q
√3 = 5q/2q
here, contradiction has arisen because of our wrong assumption. √3 is irrational but 5p/2q is rational.So, from our above calculation we conclude that 2√3/5 is irrational.